Deuteronomy 16:16 "Three times a year, all your males shall appear"

Three times a year; on Pesach, Shavuot and Sukkot, Jewish males are commanded to present themselves in the Beit HaMikdash.

The revelation of holiness on these occasions inspires everyone in their devotion to HaShem.

The arrival at the Beit HaMikdash is marked by bringing a sacrifice, the Olat Reiyah.